xyz111

• Username: 7★xyz111
• Country:  China
• Student/Professional:Student
• Institution:Massachusetts Institute of Technology Cambridge, Massachusetts, USA
• CodeChef Pro Plan: No Active Plan. View Details

Submissions Heat Map

Last 6 Months 2025 (Jul-Dec)2025 (Jan-Jun)2024 (Jul-Dec)2024 (Jan-Jun)

Rating Graph

No. of Contests Participated: 7

Current Ratings Graph Old Ratings Graph

2686 (+74)RatingProvisional
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April Challenge 2015(2015-04-13 15:00:00)

Global Rank:   4

Cheated in:   

Ratings System Update

(2015-04-13 15:00:00)

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2686 (+103)RatingProvisional
Rating i Provisional Rating, click to know more

April Challenge 2015(2022-12-20 00:00:00)

Global Rank:   4

Cheated in:   

Ratings System Update

(2022-12-20 00:00:00)

This is the difference due to changing the rating system.This graph is not updated after 20th Dec 2022. Know more

How the rating system works?

Learning Paths (0)

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Contests (7)

June Challenge 2013

Collecting Magical Berries, Just Some Permutations 3, Dessert Wizard, Two k-Convex Polygons, Count Special Matrices, Predictopus, To challenge or not, W String, Lapindromes, Little Elephant and Mouses

December Challenge 2013

Reign, Query on a tree VI, Rectangular Queries, Magic Pairs, Funny Marbles, Chef and Codes, Lucy and the Flowers, Cube Cakes, Art in Digital Age, Petya and Sequence

January Challenge 2014

ForbiddenSum, Chef and Feedback, Please like me, Bon Appetit, Byteland Tours, Meteor, Counting D-sets, Sereja and Graph, Counting The Important Pairs, Magic Trick

April Challenge 2014

Final Battle of Chef, Shortest Path in Binary Trees, Divide the Tangerine, Chef and Digits, Farmer Feb, Counting Matrices, Cards, bags and coins

May Challenge 2014

Little Elephant and Balloons, Sereja and Game, Compilers and Parsers, Dynamic Trees and Queries, Chef-jumping, Fun with AGp, Sereja and Subsegment Increasings, Chef and Strange Matrix, The Malaysian Flight Search, Stone

May Lunchtime 2014

Approximately II, Brand New Game, Roots of a Tree

April Challenge 2015

Count Sequences, Chef and Array, Chef and Interview, Broken Telephone, Inversion sorting, Division of Lands, Chef and Piano Scales, Little Party, Black-white Board Game, Devus and their voting system

Total Problems Solved: 69